Mold for cement blocks



No. 753,303.' PATENTED MAR. 1, 1904.

- W. G. PARK.

MOLD FOR CEMENT BLOCKS.

APPLICATION FILED JULY 29, 1903.

H0 MODEL.

u UNITED ;smrEsrPArE I WARREN c PARK, ornvon, rnmuois.

. Mow FOR. CEMENT BLOCKS.

srncrrrca'rron forming part of Letters Patent-.No, 753,303, dated March1', 1904.

Application filed July 29 1903. Serial No- 167,480. (No model.)

"To all whom it may concern:-

Be it known that I, WARREN G. PARK, a citizen of the United States,residing at Avon, in

the county of Fulton and State of Illinois, have invented a new anduseful Mold for Cement Blocks, of which the following is aspecification.

At the present day it is the practice in the construction-of .buildingsto employ artificialstone blocks composed of cement or analogousmaterial shaped in suitable molds in which the material is placed'whilein a plastic conjects to provide a de.

' dition and allowed to set or harden. Because of the extreme tendencyof these blocks to expand and contract under climatic influences and forvarious other reasons, it is highly desirable that they should beprovided with both interior and exterior air passages or ducts,permitting afree circulation of air around and through them. It'is alsodesirable that these blocks should haveformed upon their exterior faces"grooves or channels for the, reception of cement for. uniting the blocksone with another and with interior ducts or passages forming aconnection between the cement grooves and through which the cementfilling may be introduced into the latter.

- This invention relates to an improved mold for. the production ofblocks possessingthe features and fulfilling the general requirements asabove set forth, and has for its obice of this character-of simpleconstruction which will be efficient in operation, one in which theblocks may be cast complete at a single operation, and one in which themold may be readily removed set or hardened.

To these ends, the invention comprises the novel details ofconstructionand combination of parts more fully hereinafter described.

In the accompanying drawings, Figure 1 is a perspective view of myimproved mold, hav ing one of its sides thrown down to expose theinteriorto view. Fig. 2 is a longitudinal section on a line centrally ofone of the longitudinal members. Fig. 3 is a transverse sec tion takencentrally of oneof the transverse members. Fig. 4 is a perspective viewof a from the block after the latter has properly block produced by myimproved mold.

Referring to the drawings, 1 indicates the sides,and Qathe ends, of'myimproved mold, the topand bottom of which are preferably open. Theseparts are composed of any suitable material and are maintained in theirsetup or casting 'positionby means of hooks 3, pivoted to the ends riedby the sides, with inwardly-extending vertical flanges 5',

which overlap'the' ends of the sides 1 upon their exterior faces. Iuthisconnection it is to be understood other suitable means forsecuring thesides and ends relatively may be adopted, that herein employed beingshown simply to illustrate one simple form of ar rangement forpermitting ready connection and disconnection of the parts in setting upand collapsing the mold.

6 indicates. a primary rib of semicircular form in cross-section formedupon or otherwise associated with the inner faces of the sides and endsand situated preferably at the vertical center of the molds. This rib,which andengaging eyes 4, (:arthe ends being provided is, in effect,continuous throughout the inner circumference of the mold, serves inpractice to produce uponthe circumferential face of the block 7(illustrated in High A a continuous groove or channel '8' ofsemicircular form in cross-section, which whentheblocks areassembledconstitutes an exterior air duct or passage through which theair may circulate freely around the block.

9 9 indicate a pair of supplemental ribs of semicircular form incross-section disposed at equal distances one above and the other belowthe primary rib 6. These ribs which are formed upon or otherwiseassociated with the inner faces of the sides and ends are, in sheet,continuous throughout the inner circumfer ence of the mold and serve toproduce upon the block 7 continuous circumferential grooves or channels10, which in. practice receive the cement for securing the blockstogether in a wall.

11 is a cylindrical member which-extends centrally and longitudinallythrough the mold, with its ends removably seated in suitable openings12, formed through the ends 2. These openings 12 are disposed centrallyof the primary rib 6, whereby the member 11 will during the castingoperation produce an 'tirely around'the inner circumference of the.

air duct or opening 13, extending centrally and longitudinally throughthe block, Tand communicating at its eIn ls with the -i rcumfer-' entialair-duct 8, whereby the air in circulating through the latter will alsopass freely through the former, maintaining a circulation upon boththeexterior and interior of the .bluck.

1%; indlcates a series of cylmdr1ealmemhers disposed transverseiy of themold with their ends removably engaging openingsdo, formed in thesides 1. These members are arranged in pairs, one pair having theiropposite'ends disposed centrally of the upper secondary rib 9 and theother pair having their ends similarly disposed relative to the lowerI'll) 9, whereby these members will in practice produce transverseopenings or ducts 16 through the block 7, a pair of said ductsbeingarranged to connect the opposite sides of the upper cement-channel 10,while the other pair similarly connects the lower channel 10, thefunction of these ducts 16 being to permit the introduction of cementthrough the block into the portion of the cement-channel lying upon itslower face when assembled. The'pylindrical members 11 and 14 may be ofany suitable material, but for the sake of lightness preferably consistof sheetmetal tubes. v

lnpractice the sides and ends of the molds are assembled in the mannerabove described and the longitudinal and transverse tubular members arearranged in position. The mold is then filled with plastic'material,where it remains until sufficiently set or hardened, when the tubularmembers are all removed and the parts of the mold disconnected andwithdrawn from around the block, thus producing in a simple mannerand ata 'singleoperation an artificial-stone building-block, such as illus-'trated in Fig. 4.

The'mold is provided upon its interior and at its upper edge with a ribl extending en mold and designed to produce upon the edge of the blockamortar-rccei ring groove or recess l8 quarter-circular incross-section.

From the foregoing it will be seen that l producea device of simpleconstruction which is admirably adapted for the attainment of the endsin view, and it is to be understood that I do not, limit myself to theprecise details herein is'et forth, inasmuch as variousminor changes maybe made therein without departing from the spirit of the invention.

Having thus described'my invention, what I claim is l. The combinationwith a mold having its walls composed of separable parts, of a pluralityof ribs associated with and wholly surrounding the inner face of themold circumferentially thereof, a member extending longitudinallythrough the mold with its ends disposed centrally of one of the ribs,and a memher extending transversely of the mold with tially thereof, amember extending longitudinally through the mold with its ends disposedassociated with and wholly surrounding the of upon opposite sides of theprimary rib, and

- members extending transversely through the mold with theirendsdisposed centrally of the secondary ribs.

In testimony that I claim the foregoing as my ownI have hereto'afiixedmy signature in the presence of. two witnesses. I

' WARREN e. PARK.

Witnesses: i I

WALTER AS U'ITH," GRACE Woons.

centrally of said rib, a pair of secondary ribs,

